fixed mistake in escaping control chars

Author: barkyq

parser.go

@@ -281,19 +281,19 @@ func escapeString(dst []byte, s string) []byte {
 			// default, rest are control chars
 			dst = append(dst, c)
 		case c < 0x09:
-			dst = append(dst, []byte{92, 117, 48, 48, 48 + c, 48}...)
+			dst = append(dst, []byte{92, 117, 48, 48, 48, 48 + c}...)
 		case c == 0x09:
 			dst = append(dst, []byte{92, 116}...)
 		case c == 0x0a:
 			dst = append(dst, []byte{92, 110}...)
 		case c == 0x0d:
 			dst = append(dst, []byte{92, 114}...)
 		case c < 0x10:
-			dst = append(dst, []byte{92, 117, 48, 48, 87 + c, 48}...)
+			dst = append(dst, []byte{92, 117, 48, 48, 48, 87 + c}...)
 		case c < 0x1a:
-			dst = append(dst, []byte{92, 117, 48, 49, 32 + c, 48}...)
+			dst = append(dst, []byte{92, 117, 48, 48, 49, 32 + c}...)
 		case c < 0x20:
-			dst = append(dst, []byte{92, 117, 48, 49, 71 + c, 48}...)
+			dst = append(dst, []byte{92, 117, 48, 48, 49, 71 + c}...)
 		}
 	}
 	dst = append(dst, 34)